- file <<
- " <pgc>\n"
- " <pre>\n";
- }
-
- // When a title finishes or the user presses the menu
- // button, this always jumps to the titleset's root menu.
- // We want to return the user to the last menu they used.
- // So we arrange for each titleset's root menu to return
- // to the vmgm title menu and then dispatch from there to
- // whatever the correct menu is. We determine the correct
- // menu by looking at the menu part of g1.
-
- file << " g0 = g1 & " << menu_mask << ";\n";
-
- // There is a limit of 128 VM instructions in each PGC.
- // Therefore in each menu's <pre> section we generate
- // jumps to menus with numbers greater by 512, 256, 128,
- // ..., 1 where (a) such a menu exists, (b) this menu
- // number is divisible by twice that increment and (c) the
- // correct menu is that or a later menu. Thus each menu
- // has at most 10 such conditional jumps and is reachable
- // by at most 10 jumps from the title menu. This chain of
- // jumps might take too long on some players; this has yet
- // to be investigated.
-
- for (std::size_t menu_incr = (menu_mask + 1) / 2;
- menu_incr != 0;
- menu_incr /= 2)
- {
- if (menu_num + menu_incr < contents_.menus.size()
- && (menu_num & (menu_incr * 2 - 1)) == 0)
- {
- file <<
- " if (g0 ge " << 1 + menu_num + menu_incr
- << ")\n"
- " jump menu " << 1 + menu_num + menu_incr
- << ";\n";
- }
- }
-
- file <<
- // Highlight the appropriate button.
- " s8 = g1 & " << button_mask << ";\n"
- " </pre>\n"
- " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
-
- for (std::size_t button_num = 0;
- button_num != menu.entries.size();
- ++button_num)
- {
- file << " <button> ";
-
- if (menu.entries[button_num].first == dvd_contents::menu_pgc)
- {
- int dest_menu_num = menu.entries[button_num].second;
-
- // Look for a button on the new menu that links
- // back to this one. If there is one, set that to
- // be the highlighted button; otherwise, use the
- // first button.
- const std::vector<dvd_contents::pgc_ref> &
- dest_menu_entries =
- contents_.menus[dest_menu_num].entries;
- dvd_contents::pgc_ref this_pgc(
- dvd_contents::menu_pgc, menu_num);
- std::size_t dest_button_num = dest_menu_entries.size();
- while (dest_button_num != 0
- && dest_menu_entries[--dest_button_num] != this_pgc)
- ;
-
- file << "g1 = "
- << (1 + dest_menu_num
- + (1 + dest_button_num) * button_mult)
- << "; jump menu " << 1 + dest_menu_num << ";";
- }
+ assert(encoder_ == mpeg_encoder_mjpegtools_old
+ || encoder_ == mpeg_encoder_mjpegtools_new);
+ command_stream
+ << "pngtopnm "
+ << background_temp_->get_name()
+ << " | ppmtoy4m -v0 -n1 -F"
+ << frame_params_.rate_numer
+ << ":" << frame_params_.rate_denom
+ << " -A" << frame_params_.pixel_ratio_width
+ << ":" << frame_params_.pixel_ratio_height
+ << " -Ip ";
+ // The chroma subsampling keywords changed between
+ // versions 1.6.2 and 1.8 of mjpegtools. There is no
+ // keyword that works with both.
+ if (encoder_ == mpeg_encoder_mjpegtools_old)
+ command_stream << "-S420_mpeg2";